Already in ancient times, the goal existed to design appropriate environments to transport acoustic signals from a sound source to an audience. Strongly connected to this is the interest to understand room acoustic effects and, in the best case, to accurately predict them. This is of particular relevance today in prestigious projects such as the […]

Soundscape studies are showing the importance and the benefits regarding the sonic the environment in our daily lives. The soundscape paradigm shift highlights not just negative aspects, common on environmental noise studies, but also how the sonic environment can be recovering to the welfare of communities. Thinking on the valuation of settings, past studies focused […]

Hearing loss (HL) has multifaceted negative consequences for individuals of all age groups. Despite individual fitting based on clinical assessment, consequent usage of hearing aids (HAs) as a remedy is often discouraged due to unsatisfactory HA performance. Consequently, the methodological complexity in the development of HA algorithms has been increased by employing virtual acoustic environments, […]

Regardless of the field, measurements are essential for the validation of theories and for making well-founded decisions. A criterion for the validity and comparability of measured values is their uncertainty. The "Guide to the Expression of Uncertainty in Measurement" (GUM) provides a standardized framework for determining and interpreting measurement uncertainty. In room acoustic measurements, the […]

Building acoustics auralization is used to assess the perceptual aspects of sound transmission in built environments to provide the guidelines for architectural constructions and to evaluate the noise effects on humans. These noise effects have a negative influence on daily-life activities and create disturbances in physical and metal work. These disturbances are present within the […]

Auralisation describes the process of generating and presenting audible sound using computer programs and audio hardware. Since the result is perceived naturally by the human's auditory system, a demonstration by means of auralisation is easily comprehensible and does neither require background knowledge nor expertise. Producing auralisation under real-time constraints increases the implementation demands significantly. Real-time […]

Die Notwendigkeit gesetzlicher Regulierungen des Außengeräuschs von Personenkraftwagen (PKW) resultiert aus dem Einfluss von Lärm auf das menschliche Wohlbefinden. Die Messung von PKW-Außengeräuschen wird unter genormten Bedingungen nach gesetzlichen Regulierungen als sogenannte Vorbeifahrtmessung durchgeführt. Die jüngste gesetzliche Norm der „Economic Comission of Europe“ (ECE) ist die ECE R51.03. Die Motivation der vorliegenden Arbeit basiert auf […]

is thesis addresses key challenges in acoustics applications like troubleshooting, product optimization, and sound source modeling, focusing on the localization and characterization of sound sources using Beamforming techniques and an improved regularization of inverse methods. Traditional Beamforming methods, while effective in identifying main radiating sources, are limited by the array size and density, which affects […]

Ultrasonic metal welding (USMW) is a solid-state joining process used in various industries such as the automotive or electronics industries for its energy efficiency and other advantages. Despite its widespread use, it currently suffers from unexplained fluctuations in the weld strength, and there is a need for a robust and reliable real-time online monitoring process. […]

Aircraft are one of the major noise sources affecting residents close to airports. Classical metrics for noise assessment are usually derived from energy-based quantities, such as known from noise maps. Thus, they only consider human perception in a very basic manner. To investigate the impact of aircraft noise in a more accurate way, it is […]

Spatial auditory information allows humans to separate sources from each other. Furthermore, source localisation can steer the focus towards events that are not in sight. 3D sound is hence an important feature of human hearing. To investigate the particular effects of sound perception, a controlled reproduction of spatial sound is needed in order to recreate […]

Head-related transfer functions (HRTFs) describe the interaction between the listener’s body and incident sound waves, as they travel from an arbitrary source position to the left and right ear canal entrances. By reproducing spatial cue information for various directions, a multi-dimensional HRTF data set allows for synthesizing virtual sound sources, i.e., artificially creating the impression […]

The random-incidence absorption coefficient is measured in a reverberation room as per ISO354:2003 (2003), assuming a diffuse and isotropic sound field. However, reproducibility issues across different laboratories suggest that the assumption of isotropy does not hold in practice. This dissertation presents a novel experimental method for capturing and analyzing the directional characteristics of energy decay […]

As the awareness of health effects caused by noise has grown in recent years, so has the importance of studying noise in educational buildings. This dissertation focuses specifically on the impact of noise on young children in educational buildings from a children's perspective, a topic that has not been extensively explored. Previous research indicated that […]

Living quality perception in urban environments is closely linked to acoustical factors. With traffic being the most dominating source of environmental noise, current research associates exposure to traffic noise with a variety of negative effects on human health and well-being. In response to these concerns, the "Environmental Noise Directive" implemented by the European Union in […]

Despite significant technological advancements in recent decades, users of hearing aids and hearing protection often report dissatisfaction due to an "unnatural" auditory experience. These challenges highlight gaps in our understanding of the physical mechanisms underlying hearing. A familiar example of the complex vibroacoustic phenomena involved – and a major cause of dissatisfaction with hearing technologies […]